Steve, I have a H. Holland which I bought last year in poor condition and it passed proof last week!

Harris Holland founded the firm and operated as H. Holland until he took in his nephew, Henry.

Measure the barrels before you decide what to do. They may well be fine - no way of guessing, you have to measure them. Your local gun shop can do that for - if not, sent them to me in Texas and I'll be glad to do it for you FOC.